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''Conyza'' (horseweed, butterweed or fleabane) is a genus of flowering plants in the sunflower family.〔(Lessing, Christian Friedrich. 1832. Synopsis Generum Compositarum 203–204 ) in Latin〕〔(Tropicos, ''Conyza'' Less. )〕〔Cronquist, A. 1943. The separation of ''Erigeron'' from ''Conyza''. Bull. Torrey Bot. Club 70: 629–632. 1943.〕〔Nesom, G. L. 1990c. Further definition of ''Conyza'' (Asteraceae: Astereae). Phytologia 68: 229–233.〕 They are native to tropical and warm temperate regions throughout the world, and also north into cool temperate regions in North America and eastern Asia. The New World species of the genus are closely related to ''Erigeron'' (also known as fleabanes).〔(Flora of North America, Horseweed, ''Conyza'' Lessing )〕 The species are annual or perennial herbaceous plants, rarely shrubs, growing to 1-2 m tall. The stems are erect, branched, with alternate leaves. The flowers are produced in inflorescences, with several inflorescences loosely clustered on each stem.〔 Many plant species of the ''Conyza'' genus are ruderal species and some have been found to be resistant to the herbicide glyphosate, in some cases. ;Species〔 ==References == 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Conyza」の詳細全文を読む スポンサード リンク
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